/*
 * Copyright 2021 Fluence Labs Limited
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

mod traits;

use super::Variable;
use super::VariableWithLambda;
use crate::ast::ScalarWithLambda;
use crate::parser::lexer::LastErrorPath;
use crate::parser::lexer::Number;

use serde::Deserialize;
use serde::Serialize;

#[derive(Debug, PartialEq, Clone, Serialize, Deserialize)]
pub enum CallInstrValue<'i> {
    InitPeerId,
    Literal(&'i str),
    Variable(VariableWithLambda<'i>),
}

/// The peer part of a call instruction triplet
#[derive(Serialize, Debug, PartialEq)]
pub enum PeerPart<'i> {
    PeerPk(CallInstrValue<'i>),
    PeerPkWithServiceId(CallInstrValue<'i>, CallInstrValue<'i>),
}

/// The function part of a call instruction triplet
#[derive(Serialize, Debug, PartialEq)]
pub enum FunctionPart<'i> {
    FuncName(CallInstrValue<'i>),
    ServiceIdWithFuncName(CallInstrValue<'i>, CallInstrValue<'i>),
}

/// Triplet represents a location of the executable code in the network.
/// It is build from `PeerPart` and `FunctionPart` of a `Call` instruction.
#[derive(Debug, PartialEq, Clone, Serialize, Deserialize)]
pub struct Triplet<'i> {
    #[serde(borrow)]
    pub peer_pk: CallInstrValue<'i>,
    #[serde(borrow)]
    pub service_id: CallInstrValue<'i>,
    #[serde(borrow)]
    pub function_name: CallInstrValue<'i>,
}

/// Represents all values that is possible to set in AIR scripts.
#[derive(Debug, PartialEq, Clone, Serialize, Deserialize)]
pub enum Value<'i> {
    InitPeerId,
    LastError(LastErrorPath),
    Literal(&'i str),
    Number(Number),
    Boolean(bool),
    EmptyArray, // only empty arrays are allowed now
    Variable(VariableWithLambda<'i>),
}

#[derive(Serialize, Debug, PartialEq, Clone)]
pub enum CallOutputValue<'i> {
    Variable(Variable<'i>),
    None,
}

#[derive(Debug, PartialEq, Clone, Serialize, Deserialize)]
pub enum ApArgument<'i> {
    InitPeerId,
    LastError(LastErrorPath),
    Literal(&'i str),
    Number(Number),
    Boolean(bool),
    EmptyArray,
    Scalar(ScalarWithLambda<'i>),
}